S
M
T
W
T
F
S
30
73°
52°
31
78°
52°
1
79°
47°
2
72°
46°
3
71°
48°
4
75°
55°
5
77°
55°
6
79°
49°
7
73°
50°
8
72°
53°
9
71°
54°
10
71°
54°
11
72°
52°
12
74°
53°
13
73°
51°
14
68°
46°
15
67°
44°
16
67°
42°
17
68°
50°
18
67°
50°
19
71°
52°
20
74°
51°
21
72°
46°
22
67°
42°
23
65°
47°
24
64°
46°
25
69°
41°
26
63°
47°
27
66°
46°
28
Hist. Avg.
67°
46°
29
Hist. Avg.
66°
46°
30
Hist. Avg.
66°
46°
1
Hist. Avg.
65°
46°
2
Hist. Avg.
65°
45°
3
Hist. Avg.
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in New Berlin
New Berlin's September 2026 forecast shows daily high temperatures ranging from 63° to 79°, with overnight lows between 41° and 55°. The average high for September is 71° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in New Berlin. See also: October | November | December.
